Aggregate spreader and truck body



March 14, 1933. F. B. HURT AGGREGATE SPREADER AND TRUCK BODY Filed March 30, 1951 2 Sheets-Sheet 1 I17 4/6/7 for Freq/f Hu/7 fl y 1 y March 14, 1933. F. B. HURT AGGREGATE SPREADER AND TRUCK BODY Filed March 30, 1951 2 Sheets-Sheet Z.

hue/#01" 5'00]? .3 Huff W Patented Mar. 14, 1933 Imus, B nil-RT Q 1- were OREGON,

' AGGREG-Allfi spanner; Ann 'rRUoK BODY.

Application fiIed 'March 30,1931. Serial namesake.

My invention relates to improvements in truck bodies that are primarily intended for road building and more particularly for the placing of the top coating on an oil bound 5 or bitumen bound crushed rock surface.

Y Heretofore it has beenthe general custom in devices of this kind to place an accessory, or attachment, on the bacl; ofthe truck and as the truck body is tilted to deliver the Q coating material into theaccessory spread:

er head and distribute the same upon the road or surface from the spreader head;

Through the use of my new and improved device 1' construct an attachment integral with the truck body. I then distribute the material being delivered from the truck to the spreader head upon the road surface as the truck is backed over the. freshly laid binder material. r n

One of the difliculties in putting on top s i g o i k d sseell in a a t g durable and satisfactory job is to eliminate the dust particles from the aggregate being used as a top dressing; this is partially accomplished at times through the air cur rents passing through the aggregate as it falls from the spreader head to the Surface. At times is is g av ted du t h direction of the wind blowing in the direction ofthe travel of the truck. At such times practically the total ot the finely commi: nut-ed dust particles are deposited upon the freshly coated binder material in advance of the deposit of the top dressing of crushed stone thereupon. This greatly aggravates the situation and prevents a proper binding of the top dressing of crushed stone agent, to the binding as bitumen.

To prevent this I have provided an air motor upon-the truck body and deliver a be blown upon the oppositely disposed sides of the stream to therebypredetermine the direction of the blast through the stream of V the aggregatetopping to be delivered upon thebin e gent. 1 to i r There is a tendency in crushed 7 aggregate to, arch .oyer and to leave a pa tof thebind 55 1 g ag t u a 1 w th i the t p s ile of crushed stone; to prevent this I have provided a fluid operated piston and cylinder ass iated w th One-0f he e l ft op er to m thesam i1 1 n s il a o y 5 nannerasdesireito thereby prevent the arc ing O a the po nt o s ar of h ma eri r t e prea r e an t e te an en fl w o m r a fr m t truckbody into the spreader head and "to 5 deliver the same-upon the roadin a uniform thickness, a: a r

I also provide manual 'means for shifting "the gate opening to prevent the arching over of. the materials and to uniformly distribute the same. The manualmeans being adapted forbeing actuated by an attendant Who rides the truck during the topping p ssa a Chutes are associated with the rear of the 5 bottom of the truck so-tha t materials flow directly into-the spreader head from the truck body and to the full Width of the strip of the road to be covered with the top dressing. The-bottomcof the hop-perinto 39 which the aggregates flow from the truck being spaced apart from the truck sufliciently to compensate for the slope .to which the agg egate will flow from the truckbody into the ends. of the spreader head. flhis -V v insures uniform. delivery of the materials into thedistributor head to the full width of the same. a i Ina device otthis kind and where the distributor heads are formed integral with 9 the truck body, make-shift devices are eliminated' and the same truck may be used for other purposes with equal facility. One of the objects of my present device is to place in the road builders hands an eflicient device-that may be used in the placingof a coatof uniform thickness over the surface of the road to be coated. I v

The primary object of my invention consists in providing atruck body-that maybe 9 placed upon and removed from the chassis of an automobile truck having formed integral therewith a spreader head that may be efliciently used in the spreading of crushed rock aggregate upon a road surface with a uniform thickness being delivered over the entire area being traversed by the spreader head.

A still further object of my invention consists in providing an attachment for an automobile truck in the form of a body and a spreader head that may be used in the placing of the crushed rock aggregate upon the binder top dressing coating of uniform thickness.

A' still further object of my invention consists in providing aspreader head and associated elements that may beused in the delivering of crushed rock aggregate upon a road bed, free from the finely comminuted dust particles that J are constantly found within the aggregate to be used as the top dressing. Y v

A still further object of my invention consists in providing a spreader head, the discharge gate of which, maybe manually, or

I automatically manipulated,"to prevent the arching of the material at the point of discharge from the head, to insure the delivery of a uniform stream of material upon a road bed. I r

- tures of construction and combination of drawings which accompany and YVith these and incidental objects in view, the invention consists in certain novel feaparts, the essential elements of which are set forth in the appended claims, and a pre ferred form of embodiment of which is hereinafter shown with reference to the form apart of this specification.

, In the drawings: r

Fig. 1 is a fragmentary, side view of the chassis of a truck and of the truck body and illustrates the spreaderhead disposed thereupon and illustrates the discharge gate of the'spreader head attached for being manually positioned. This view illustrates the air blast as being discharged from the rear of the truck outward through the crushed rock aggregate being discharged from the spreader head. 1

Fig. 2 is a. rear view of the truck body and spreader head. d

Fig; 3 is a fragmentary, sectional; end view of the spreader head and of the discharge gate. This view illustrates the gate for being actuated through the use of a piston reciprocably disposed within a cylinder,

. as by air.

Fig. .4 is a fragmentary, sectional side view of the truck body and a sectional, end.

View of the spreader head attached thereto. Fig. .5 is agtop, plan view of the mecha nism illustrated iirFigf f.

' 6 is a fragmentary, sectional, side .L the -mounted upon'he upper rear plate 6 and the *the spreader head to. the underside of the truck body and securethe spreader head to the truck body through the use of any suitable fastening means as by a plurality of bolts 3 and 4. The spreader head is comprised of re'arwardly inclined front and rear side walls 5 and 6; the rear wall being comprisedof a plurality of suitable wall members to-adapt'the lower one 7 for being moved toward and away from the bottom wall'8 in order to form a pouring or discharge opening-9, through which the aggregates are to be discharged.

In a device of this kind it is'necessary to spread aggregates at a greater width than that of the truck body and of the truck wheels in order that the surface to bev traversed by the truck in the backing up of 11 of the truck above he normal bot-tom surface of the truck body and encasing the same with closure plates 12 and 13.

To further facilitate the discharging of all of thematerials uniformly from the spreader head I form the sides 14 and 15 of the spreader head as uniformly sloping downward from the center line. 16 to increase the tendency of the material to flow to wall ofthe spreader head, is hinged as illustrated in Fig. 4:, and where the same is to be -manually operated, a plurality of spaced brackets 19, are secured to the plate 7 and a journal bearing 20 is formed in the outer end of each of-the bracket members 19, An operating shaft 21 is journaled within the. journal bearings of'the brackets and a settable hand lever 22 is fixedly secured to shaft. A' toothed quadrant 23 is looking pawl 2tjof the. hand lever is to the chest.

adapted to engage within the teeth of the quadrant; this facilitates the setting of the rear plate 7 to the desired angle'iand to predetermine the thickness of the stream ot material being delivered from the spreader .head;

extends through the cylinder head. The

piston rod being secured to a bracket 28 that outwardly extends from the rear o f the lower plate 28. When so equipped the plate 29 is slidably disposed relative to the upper plate 30 and themovement of the plate 29 up and down predetermines the thickness of the stream of material being discharged from the spreader head. This is predetermined by the set position of the adjusting stud 31 that downwardly extends from the bracket 28 and iniregistry with a foot '32. The periodic movement of the plate 29 through the piston action prevents the archingof the material at the point of discharge through the discharge opening from the spreader head.

have not here shown the source of supply of the fluid under-pressure for operating the piston within the cylinder and for supplying the air blast for blowing the dust particles from the aggregate as any suitable source of supply may be used.

When it is desired to remove the spreader head from the truck body to facilitate the use of-thetruclr body for other purposes the spreader head is removed fromthe truck body and the closure plate 33 closes the opening through the bottom of the truck and side plates 34 are placed across the openings in the side walls of the truck body to cover the openings of the side as illustrated at 11.

In order to eliminate the finely con minuted dust particles from the, aggregate being used as the top dressing, I place a bracket 35 upon the rear end of the chassis frame and secure a chest 36 tothe lower end of thesame. One or more flexible tubes 37 deliver air in sufficient volume and pressure A'slit 38, or a plurality of nozzle heads 39 are disposed in the' chest 36 to permit the air blast passing through the. stream 40 of the material being delivered from the spreader head and to remove the same by cil ities for blowing the air through the stream of material, *being discharged from the spreader head, toward, or away from the line'ot travel of the truck in order to prevent the dust particlesbeing blown from e the aggregate and being deposited upon the freshly laid binder. I have shown in Fig.

7 a chest '41 for the air currents being dis- ;posed upon the sidexopposite toithat of the chest illustrated in Fig. .1, in order that-the driver, or operator. of the truck, may elect which or thechests are to be used in order to :blow the particles away from the-uncovv ered portion of the roadway upon which the binder agent has been placed.

1 While the form of mechanism herein shown and described isadmirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form-eternbocliment herein shown and described, as it is susceptible of embodiment in various forms, all coming within the scope of the claims which follow I What I claim is: I 1

1. In a device of the class described, the

combination of a truck body, a "discharge opening for aggregates disposed within the rear of the bottom of the truckbody and the lower edge ofthe sidewalls of the truck 1 body, an aggregate spreader head disposed in registry with the openings and therebelow, spreader head ends extending laterally beyond the side walls of the truck body, a bottom to the i spreader sloping downwardly and outwardly a hinged plate associated with one of the, side walls of the spreader head, hydraulic and manually manipulative means for setting a plate to variably'predetermine an opening through which aggregates may be distributed, an air blast pipe, extending transversely of the truck body and mounted beneath the aggro?- gate distributing opening, nozzles disposed along the pipe, and meansfor forcing an air blast through the aggregates as the same leave the spre'aderahead. 7

- 2. In a device. of the-class described, the combination of a truck body, an opening disposed across the rear end of the bottom of the truck body and'through the adjacent side walls Ofthe truck body, a-spreader headdisposed in registry with the openings, and extending beyond the side walls sii'go of the truck, and removably secured to the truck body, a bottom to the spreader head sloping downwardiand'outward from the center, a hinged closure plate secured to the one of the side walls'of the-spreader head "adapted for creating an openingof prede terminabl'e depth, through which aggregates are to be released from the spreader control, and'means for aeratingthe aggregates and eliminating the dustparticles therefrom as the aggregates flow'from the spreader head to the surface to be dressed. 3.. In a device of the class described, the combination of a truck body, a spreader head removably secured to the truck body,

an opening disposed through the base of 7 adapted for forming a release, through the truck body and the side walls of the truck to. permit crushed aggregates to enter the .spreader head, means for. securing an even distribution of .aggregate along the width of the spreader head, means for releasing the aggregates from the spreader head in a stream of continuously controllable predetermined depth andmeansfor blowing air through the aggregates when released from the spreader head."

' 4. In a device of the class described, the combination of *a truck body, a spreader head removably secured to the base-and the side walls of the'truck body and adapted to receive aggregates therefrom directly into the spreader head, means for uniformly distributing the aggregate within the spreader head, settable means for predetermining the breadth of opening disposed longitudinally of the spreader head through which aggregates are to be released, and means for regulating the depth of opening from a remote control. V n I 5. In a device of the class described, the combination of a truck body, a spreader head removably secured to the truck body and adapted to receive aggregates through the bottom and side walls of the truckbody into the spreader head, means for distributing the aggregate uniformly within thespreader' head, a hinged closure on the spreader head, and means for momentarily actuating the hinged closure from a remote control.

6. Ina device'of the class described, the combination of a spreader head adapted for being removably secured to a truck body, a hinged closure disposed longitudinally of the spreader head and adapted for predetermining the depth of arelease passageway leading through one of the longitudinal walls of the spreader head, and settable means for predetermining the depth of opening release and means for momentarily actuating the hinged closure from a remote control. 1 a 5 1 7. In a device of the class described, the combination of a spreader headadapted for being removably secured to an automobile truck vbody, intercommunicating passageways disposed between the spreader head and the interior" of" the truck body and through the base and side wall of the truck body, ahinged closure for the spreader head which the aggregates to be spread, are released andsettable means for predetermining the depth ofopening to be created.

8. In a device otthe class described, the combination of a spreader head adapted for being secured to the rear ofthe bottom of the truck body, inter-communicating passageways leading from the truck body to the spreader head, a settable discharge opening disposed longitudinally of the spreader head, the ends of the discharge opening being lower than the center, relative to a horizontal line, means for predetermining the amount of opening to which the aggregates are to flow, means for momentarily manipulating the adjustable closure of the opening, from a remote control, and means for removing the dust particles from the aggregate by an air current, after the same have been released from the spreader head.'

9. In a device of the class described, the combination of a truck body, a distributor head removably secured-to the underside of head, the endsof the discharge outlet being lower than the mid section, settable means for predetermining the opening of the discharge outlet, means for momentarily changing the depthfof the outlet to prevent the materials to be discharged through the outdischarging an air blast through the stream flow of aggregate being discharged from the distributor head.

10. In a device of the class described, the combination of a truck body, a spreader head disposed below the truck body and removably secured thereto, thebottom of the truck body being cut out to 'faoilitatethe crushed rock passing therethrough into the spreader head, the spreader head beingof a greater width than that ofthe truck body, the side walls of the truck being cut out and passageways formed integral therewith to facilitate the crushed aggregate passing therethrough and into the ends of the spreader head, means for removably securing the spreader head assembly to the truckbody, means for closing the openings in the bottom and the side walls of the truck body when the spreader head is removed from the truck body, means for releasing a stream of aggregate, of predetermined thickness, from the spreader head, and means for aerating the aggregates after release from the spreader head and before the aggregate reachesthe roadway. V

11. In a deviceot the class described," the combination of a truck body, a spreader let, from arching thereover, and means for r head, of greater width than the over-all width of the truck body, removably secured to the truck body, intercommunicatmg passageways disposed between the bottom and the side walls of the truck body and the spreader head, adapted to deliver crushed rock from the truck body to the total width of the spreader head, means for releasing the spreader head from the truck body and for closing up the intercommunicating openings in the bottom and the side walls of the truck, means for predetermining the stream depth that is to be released from the spreader head, and means for blowing an air current through the stream of aggregate, as the aggregate falls to the roadway.

12. In a device of the class described, the combination of a truck body, a spreader head removably secured to the underside of the truck body, means for delivering aggregates from the truck body, through the sides of and the bottom of the truck body, and into the spreader head, settable means for predetermining the depth of the stream flow of aggregates from the spreader head, and means for forcing an air current through the stream of aggregate after the same leaves the spreader head.

13. In a device of the class described, the combination of a truck body, a spreader head secured to the truck body, means for passing crushed aggregates through the side walls and the bottom of the truck body and into the spreader head, means for releasing. aggregates from the spreader head in a predetermined depth and means for forcing an air current through the aggregates after release from the spreader head.

14. In a device of the class described, the combination of a spreader head, a discharge opening disposed adjacent the lower edge of the spreader head, a closure plate for the spreader head, settable means for placing the plate for predetermining the depth of the opening, and means for forcing an air current, from either side, through the materials after they are released from the spreader head.

15. In a device of the class described, the combination of a spreader head, a discharge opening, of settable depth, disposed through one side of the spreader head, and means for forcing an air blast through the materials after they are discharged from the spreader head.

16. A method of spreading aggregates upon a binder surface of a roadway, consisting in the placing of the aggregates in a spreader head mounted upon a truck, the backing of the truck and the releasing of the aggregates from the spreader head,and the depositing of the same upon the binder coated surface and the blowing of the dust from the coating material as the same drops from the spreader head to the roadway, to

be top dressed.

coated roadway, consisting in the releasing of the top coating materials ina stream of desired thickness, from a truck body, as the truck is backed up and the blowing of an air current through the top coating material as it falls to the roadway, to be top dressed.

18. A method of top dressing a roadway, consisting in the feeding of the material in a continuous stream, of uniform thickness, upon the roadway to be top dressed and'the removing of the dust from the top dressing material, by air currents passing there- 'through.

19. A method of top dressing a roadway coated with abinder agent, consisting in the spreading of the top coating in a stream upon the roadway and the forcing of'an air current through the stream, in advance of the same reaching the coated surface of the roadway.

FRANK B. HURT.

17. A method of top dressing a binder 

